How do I get a meaningful resolution to my 7 years of connectivity issues?

I have had Comcast internet, on and off at this location for the past 7 years and have had nothing but consistant problems.

I have a service technicians to my business too many times to count. I am on a first name basis with them and they don't even have to trouble shoot when they get there because they already know what the issue is. The node I am on is known to be the worst in the county. I have been told that residents in the area are backfeeding noise into the network, slowing down traffic. 

Cylically, the internet drops at 6-9pm eastern and we have poor connectivity for the remainder of the night, when we need the high speeds the most. Our business requires access through a VPN to connect to equipment and we cannot be offline in the evening, so the usual troubleshooting steps of "turn it off and on again" aren't possible. As I stated, the techinicans have cleared all of our equipment on numerous occations. I have even had a team of technicians and their supervisor out and they replaced the ENTIRE network from the utiity pole all the way through to the modem. I have bought the best equipment on the market to ensure that was not the issue. I have the Motorola SB 6141 paired with a Nighthawk router. All computer connections are hardwired for the most reliable connection.

Day after day, week after week we are fed the same responses with no meaningful resolution- I will get a $5 credit if I call during an outage to report it and then call back once service is restored to claim the credit. $5 is not only meaningless, it is insulting. The techs that come out on trouble calles already know what the issue is and they say that there is nothing they can do but submit the issue to the linemen.

Because I do not have any other options for high speed internet I am locked in with Comcast. I have begged and pleaded for meaningful resolution and I have yet to be afforded one. I am not moving the business and do not have an meaningful alternatives for high speed internet, the only options I have are to go through legal avenues for resolution, be it the FCC, BBB and local government entities. Is that what it will take? With over 50 technicians at my property over the past years, it isn't going to be a hard sell. 

What will it take to get a meaningful resolution?